CN204879546U - Lighting device - Google Patents

Abstract

The utility model provides a lighting device, it restraines the manufacturing cost of lens very low in having the lighting device of the lens that possess the concave part of accomodating LED, in addition, disposes LED densely. The utility model discloses a lighting device has LED (31) and lens (6) of control from the grading of the light of LED (31) outgoing. Lens (6) have: concave part (62) supply from the light incidence of LED (31) outgoing, and the LED portion of taking in (63), describe for the counterbore from all marginal parts formation of concave part (62) to accomodate LED (31). According to this structure, even (63) are also accomodate because LED (31) accomodate at LED, so even do not increase the contact that concave part (62) also can restrain LED (31) and concave part (62) to the mounted position of LED (31) skew. Consequently, can constitute very for a short time with lens (6) to can restrain the manufacturing cost of lens (6) very low, in addition, can dispose LED (31) densely.

Description

Lighting device

Technical field

The utility model relates to a kind of using the lighting device of LED as light source.

Background technology

LED can carry out the luminescence of high brightness with low electric power, and the life-span is long, therefore instead incandescent lamp, fluorescent lamp light source and get most of the attention.As using the back-up lamp (lighting device) of such LED as light source, known there is multiple LED, be oppositely arranged respectively and control the lighting device (for example, referring to patent document 1) of multiple lens of the luminous intensity distribution of the light from this LED outgoing with these LED.Multiple lens have dome-type recess at mask relative with LED respectively, to be configured in the state of this recess storage LED.Incide lens from the light of LED outgoing from recess and in lens propagate after, from lateral surface (exit facet) the externally outgoing of lens.

[patent document 1] Japanese Unexamined Patent Publication 2013-77830 publication

Utility model content

Utility model technical problem to be solved

In above-mentioned lighting device, owing to arranging lens respectively for each LED, even if so suppose the installation site skew of LED in the fabrication process, as long as finely tune each lens position to be accommodated in recess to make LED.But the fine setting of such lens position is very time-consuming when the quantity of LED and lens is many.In addition, when multiple lens are integrally constituted each other, due to each lens position can not be adjusted respectively, if so the installation site skew of LED, then there is LED and to contact with recess and can not the situation of mounted lens.

Therefore, consider by recess being formed avoid LED to contact with recess more greatly.But if like this, the distribution controls of carrying out due to lens is determined, so cause making lens itself maximize to obtain desired luminous intensity distribution by the balance of the size of the size of recess and the exit facet of lens.If lens become large, then the manufacturing cost of lens uprises, in addition, owing to needing to expand the distance between LED, so can not configure LED thick and fast to configure lens.

The utility model is the utility model solved the problems of the technologies described above, and its object is to, and provides a kind of lighting device, in the lighting device of lens possessing the recess having storage LED, can the manufacturing cost of lens be suppressed very low, in addition, LED can be configured thick and fast.

For the technological means of technical solution problem

The feature of lighting device of the present utility model is, the lens that this lighting device has LED and controls from the luminous intensity distribution of the light of described LED outgoing, and described lens have: recess, is arranged at the opposite face relative with described LED and supplies from the light of this LED outgoing incident; And LED incorporating section, be formed as spot-facing shape and the contact of passing through to receive described LED and suppressing this LED and described recess at described opposite face from the circumference of described recess; Described LED incorporating section and described recess continuous smoothly by the convex surface protruded relative to described LED.

Utility model effect

According to the utility model, even if the installation site of LED offsets, because LED is incorporated in LED incorporating section, even if so do not increase the contact that recess also can suppress LED and recess yet.Therefore, it is possible to lens are configured very little, and can the manufacturing cost of lens be suppressed very low, in addition, closely can configure LED.

Accompanying drawing explanation

Fig. 1 is the exploded perspective view of the lighting device of an embodiment of the present utility model.

Fig. 2 a forms the lens of above-mentioned lighting device and the profile of LED, and Fig. 2 b is the top view observing these lens from opposite face side.

Fig. 3 represents profile when to produce position skew between said lens and LED.

The figure of Fig. 4 a to be the figure of the luminous intensity distribution of the light of the said lens outgoing represented from the convex surface with radius of curvature R=0.5mm, Fig. 4 b be distribution curve flux of the light of the lens outgoing represented from Fig. 4 a, Fig. 4 c is by the enlarged drawing in the region of the dotted line of Fig. 4 b.

Figure, Fig. 5 c of Fig. 5 a to be the figure of the luminous intensity distribution of the light of the said lens outgoing represented from the convex surface with radius of curvature R=1.0mm, Fig. 5 b be distribution curve flux of the light of the lens outgoing represented from Fig. 5 a is by the enlarged drawing in the region of the dotted line of Fig. 5 b.

The figure of Fig. 6 a to be the figure of the luminous intensity distribution of the light of the said lens outgoing represented from the convex surface with radius of curvature R=1.5mm, Fig. 6 b be distribution curve flux of the light of the lens outgoing represented from Fig. 6 a, Fig. 6 c is by the enlarged drawing in the region of the dotted line of Fig. 6 b.

The figure of Fig. 7 a to be the figure of the luminous intensity distribution of the light of the said lens outgoing represented from the convex surface with radius of curvature R=2.0mm, Fig. 7 b be distribution curve flux of the light of the lens outgoing represented from Fig. 7 a, Fig. 7 c is by the enlarged drawing in the region of the dotted line of Fig. 7 b.

Fig. 8 is the profile of the lens without convex surface.

The figure of the distribution curve flux of the light of Fig. 9 a lens outgoing that to be the figure of the luminous intensity distribution of the light representing the said lens outgoing never with convex surface, Fig. 9 b be from Fig. 9 a, Fig. 9 c is by the enlarged drawing in the region of the dotted line of Fig. 9 b.

Description of reference numerals

1 lighting device

31LED

41 connecting portions

6 lens

61 opposite faces

62 recesses

63LED incorporating section

64 convex surfaces

Detailed description of the invention

The lighting device of an embodiment of the present utility model is described referring to figs. 1 through Fig. 7 c.This lighting device is the ceiling light being installed on ceiling face.

As shown in Figure 1, the diffuser cap 5 that lighting device 1 has the framework 2 being formed as discoideus, the light source portion 3 of the one side being installed on framework 2 (installed surface 21), the optics 4 and making that controls the luminous intensity distribution of the light from light source portion 3 outgoing spread from the light of optics 4 outgoing.

Framework 2 is installed on ceiling face via the face with installed surface 21 opposite side.Framework 2 have the toroidal of centre disposed therein opening 22, to engage with opening 22 and for the connector 23 installed to ceiling face and for keeping multiple diffuser cap maintaining parts 24 of diffuser cap 5.Framework 2 is fixed on ceiling face by engaging with hook ceiling (hookceiling) (not shown) that be arranged at ceiling face by connector 23, and is built-in with the circuit part (not shown) turned on light controlling light source portion 3.Engaged with hook ceiling by connector 23, circuit part is connected with source power supply via hook ceiling, controls the power supply from this source power supply to light source portion 3.Diffuser cap maintaining part 24 is by engaging with the holding section (with reference to aftermentioned) of diffuser cap 5 and keep diffuser cap 5.Diffuser cap maintaining part 24 is arranged on the circumference of installed surface 21, in legend, is spaced the angle of 120 degree and configures.Installed surface 21, by the coating of whitewash or the evaporation of light reflective metal material, is configured to have the visible light reflectivity of such as 75 ~ 95%.Framework 2 is such as formed by carrying out punch process and machining to the aluminium sheet or steel plate with regulation rigidity.

Light source portion 3 has multiple LED31 and installs the wiring substrate 32 of these LED31.Wiring substrate 32 is formed as annular plate-like, is installed on the installed surface 21 of framework 2 in the mode that Shi Qi center is consistent with the center of framework 2.Multiple LED31 be mounted in wiring substrate 32 with the face of opposition side, face being installed on installed surface 21, the concentric circles of four centered by the center of framework 2 configures across predetermined distance.The respective optical axis of these LED31 is configured to orthogonal with wiring substrate 32.LED31 is such as made up of White LED, its have outgoing blue light LED chip, seal this LED chip encapsulant and to be dispersed in sealing material and blue light to be converted to the fluorophor of sodium yellow, by making blue light and sodium yellow colour mixture and outgoing white light each other.Wiring substrate 32 is made up of Ins. ulative material such as expoxy glass resins, has the Wiring pattern (not shown) be connected with each LED31.Each Wiring pattern is connected with the circuit part of connector 23.

Optics 4 is formed as the annular plate-like in the same size with wiring substrate 32, and is set to cover LED31.Optics 4 has the multiple lens 6 be oppositely arranged with each LED31 and the connecting portion 41 be connected to each other by multiple lens 6, thus is configured to parts.So, by optics 4 is configured to parts, the assembling of lighting device 1 is easily carried out.Optics 4 is such as made up of the resin with light transmission and electrical insulating property that clear polycarbonate resin, transparent acrylic resin or transparent polystyrene resin are such, and is tightened in framework 2.

Diffuser cap 5 has the diameter roughly the same with framework 2, is formed as to light exit direction side (being upside in FIG) protruding rounded dome shape.Diffuser cap 5 within it side face end has the multiple holding sections (not shown) engaged with the diffuser cap maintaining part 24 of framework 2, and is installed on framework 2 under the state including light source portion 3 and optics 4.

As shown in Fig. 2 a, Fig. 2 b, lens 6 have and relatively to form plane opposite face 61 with LED31, the recess 62 that is arranged at opposite face 61, are formed as the LED incorporating section 63 of spot-facing (Japanese: ザ グ リ) shape at opposite face 61 from the circumference 62a of recess 62.Lens 6 are configured to, and its optical axis is roughly consistent with the optical axis Ax of LED31.Recess 62 is formed as rounded dome shape, and is configured to cover LED31.Recess 62 works as the plane of incidence from the light incidence of LED31 outgoing.LED incorporating section 63 is formed as toroidal when observing from the optical axis direction of lens 6.(a) large to the distance D2 of wiring substrate 32 than the end face of LED31 with reference to Fig. 2, LED incorporating section 63 is configured to the size can receiving LED31 to distance D1 from the bottom surface 63a of LED incorporating section 63 to wiring substrate 32.Distance D1, D2 are such as set to 0.7mm and 0.5mm respectively.

The bottom surface 63a of LED incorporating section 63 and recess 62 utilize continuous smoothly relative to the convex surface 64 of LED31 projection.Such as, when observing from the optical axis direction of lens 6, when the maximum outside diameter of LED31 is 4.2mm and the diameter (external diameter) of recess 62 and LED incorporating section 63 is respectively 4.6mm and 6.7mm, the curved surface that convex surface 64 is 0.5 ~ 2.0mm by radius of curvature R is formed.The diameter of LED incorporating section 63 is configured to, preferably 0.1mm more than larger than the diameter of recess 62, more preferably 0.1 ~ 3mm larger than the diameter of recess 62.In addition, LED incorporating section 63 can extend to the end of opposite face 61.

In addition, lens 6 have for the dielectric portion 65 propagated from the light of recess 62 incidence and the exit facet 66 supplying the light outgoing propagating into dielectric portion 65.Exit facet 66 is formed as the level and smooth concave curved surface relative to LED31 depression.

As shown in Figure 3, according to the lens 6 formed as mentioned above, such as, when LED31 is installed on wiring substrate 32, though the skew assigned position, position of LED31 (shown in dotted line) some, LED31 is also accommodated in LED incorporating section 63.Thus, even if do not increase recess 62, also can suppress the contact of LED31 and recess 62, therefore, it is possible to be configured less by lens 6.Therefore, it is possible to the manufacturing cost of lens 6 is suppressed very low, in addition, owing to not needing the distance expanded between LED31 to configure lens 6, so LED31 can be configured thick and fast.And, even if the position of LED31 offsets, also can mounted lens 6, therefore, it is possible to make the yield rate of lighting device 1 improve.The frequency that quantity is more, the installation site of LED31 offsets being installed on the LED31 of wiring substrate 32 is higher, and therefore, yield rate such when being provided with a lot of LED31 as lighting device 1 improves particular importance.In addition, the raising of this yield rate also particular importance when making multiple lens 6 be integrally constituted each other as lighting device 1 and the position of each lens 6 can not be finely tuned.

Then, the luminous intensity distribution of the light from lens 6 outgoing is described.As shown in Fig. 4 a to Fig. 4 c, when make the radius of curvature R of convex surface 64 be 0.5mm form lens 6, become roughly 76 degree from the maximum luminosity angle of the light of lens 6 outgoing relative to optical axis Ax.Now, because be provided with convex surface 64, thus from LED31 outgoing and be directly incident on recess 62 light and from LED31 outgoing and between the light being directly incident on LED incorporating section 63, luminous intensity distribution does not sharply change.Therefore, when user observes the exit facet 66 of lens 6, the difference of angle, the brightness of emergent light can not alter a great deal according to the observation, and the natural daylight that bright line is few can be in sight from lens 6 outgoing.Change from distribution curve flux that also can to specify such bright line few smoothly.

Fig. 5 a to Fig. 5 c represents makes the radius of curvature R of convex surface 64 be the situation that 1.0mm forms lens 6.In this case, can obtain is the effect that the situation of 0.5mm is identical with above-mentioned radius of curvature R, in addition, becomes roughly 76 degree from the maximum luminosity angle of the light of lens 6 outgoing relative to the optical axis Ax of LED31.

Fig. 6 a to Fig. 6 c represents makes the radius of curvature R of convex surface 64 be the situation that 1.5mm forms lens 6.In this case, being that the situation of 0.5mm or 1.0mm is slightly little from the maximum luminosity angle of the light of lens 6 outgoing than making radius of curvature R, becoming roughly 74 degree relative to the optical axis Ax of LED31.Utilize this lens 6, also can obtain and make above-mentioned radius of curvature R be the effect that the lens 6 of 0.5mm are identical.

Fig. 7 a to Fig. 7 c represents makes the radius of curvature R of convex surface 64 be the situation that 2.0mm forms lens 6.In this case, being that the situation of 1.5mm is less from the maximum luminosity angle of the light of lens 6 outgoing than making radius of curvature R, becoming roughly 72 degree relative to the optical axis Ax of LED31.Utilize this lens 6, can obtain and make above-mentioned radius of curvature R be the effect that the lens 6 of 0.5mm are identical.

On the other hand, Fig. 8 as a reference example, represents the lens 6 not having above-mentioned convex surface 64.In such lens 6, the border between recess 62 and the bottom surface 63a of LED incorporating section 63 produces flex point P.Therefore, as shown in Fig. 9 a to Fig. 9 c, from the luminous intensity distribution of the light of lens 6 outgoing with flex point P for border alters a great deal, in addition, easily produce bright line (particularly, with reference to the region that the single dotted broken line of Fig. 9 c surrounds).And the light transmitted to connecting portion 41 side in lens 6 increases, and compared with the lens 6 shown in Fig. 4 to Fig. 7 c, tails off from the light of lens 6 outgoing.

As described above convex surface 64 is set at lens 6, from the few natural daylight of lens 6 outgoing bright line, in addition, can increases the emergent light from lens 6.And, because from the light of lens 6 relative to the direction strong outgoing of optical axis Ax to roughly 72 ~ 76 degree, so when observing lighting device 1 from diffuser cap 5 side, user is difficult to the granular sensation feeling LED31.

It should be noted that, lighting device of the present utility model is not defined as above-mentioned embodiment, but can carry out various distortion.Such as, lens must not arranged relative to each LED respectively, can be formed as the rounded cylindrical covering the LED be configured on a concentric circles in the lump, and are configured to have LED incorporating section at the both ends of its radial direction.In addition, LED can be made up of with the LED these two kinds of the light sending warm white the LED of the light such as sending color of sunshine, by carrying out brightness adjustment control to these two kinds of LED independently of one another, makes the light color variable of irradiation light.

Claims (3)

1. a lighting device, is characterized in that, the lens that this lighting device has LED and controls from the luminous intensity distribution of the light of described LED outgoing,

Described lens have: recess, are arranged at the opposite face relative with described LED and supply from the light of this LED outgoing incident; And LED incorporating section, be formed as spot-facing shape and the contact of passing through to receive described LED and suppressing this LED and described recess at described opposite face from the circumference of described recess;

Described LED incorporating section and described recess continuous smoothly by the convex surface protruded relative to described LED.

2. lighting device as claimed in claim 1, is characterized in that,

Described LED and described lens arrange multiple respectively,

Multiple described lens are configured to parts via the described lens of connection connecting portion each other.

3. lighting device as claimed in claim 2, is characterized in that,

Described lens are arranged respectively for multiple described LED.